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Spatial power combining of Gunn diodes using an overmoded-waveguide resonator at millimeter wavelengths

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4 Author(s)
Jongsuck Bae ; Res. Inst. of Electr. Commun., Tohoku Univ., Sendai, Japan ; T. Unou ; T. Fujii ; K. Mizuno

A millimeter-wave oscillator which incorporates an overmoded-waveguide resonator with an array of TE10-mode waveguides containing Gunn diodes, has been developed as a means for achieving highly efficient spatial power combining. This oscillator makes use of mode conversion of radiation power from Gunn diodes in the waveguide array to the overmoded-waveguide resonator to produce high power at millimeter wavelengths. An efficiency of about 83% and an output power of 1.5 W (continuous wave) at 61.4 GHz, has been achieved with a 3×3 waveguide Gunn diode array

Published in:

IEEE Transactions on Microwave Theory and Techniques  (Volume:46 ,  Issue: 12 )